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Journals

Synthesis and Characterization of Colloidal Beta-HgS Quantum Dots

October 1, 2002

Author(s)

K A. Higginson, M Kuno, John E. Bonevich, S B. Qadri, M Yousuf, H Mattoussi

High-quality colloidal mercury sulfide quantum dots (QDs) are synthesized at room temperature using a synthetic strategy combining the effects of strongly...

Semifluorinated Aromatic Side-Group Polystyrene-Based Block Copolymers: Bulk Structure and Surface Orientation Studies

October 1, 2002

Author(s)

X Li, L Andruzzi, E Chiellini, Giancarlo Galli, Christopher K. Ober, A Hexemer, E K. Kramer, Daniel A. Fischer

Two families of narrow polydispersity poly(styrene)-based block copolymers bearing side groups containing both a phenyl ring and a para-linked semifluorinated...

Ultrafast Photodissociation of Br₂: Laser-Generated High-Harmonic Soft X-Ray Probing of the Transient Photoelectron Spectra and Ionization Cross Sections

October 1, 2002

Author(s)

L Nugent-Glandorf, M Scheer, D A. Samuels, V M. Bierbaum, S R. Leone

The ultrafast dissociation of gas-phase Br 2 is probed via a 400 nm-pump soft-x-ray probe scheme at five different high-order harmonicwavelengths (13th, 15th...

Linear Spin Waves in a Trapped Bose Gas

October 1, 2002

Author(s)

T Nikuni, J E. Williams, Charles W. Clark

An ultra-cold Bose gas of two level atoms can be thought of as a spin-1/2 Bose gas. It supports spin wave collective modes due to the exchange mean field. Such...

Simultaneous Control of Time-Dependent Population Transfer Dynamics and Wave-Packet Quantum Interferences in Li₂ by Shaped Ultrafast Pulses

October 1, 2002

Author(s)

J B. Ballard, H U. Stauffer, E Mirowski, S R. Leone

Novel ultrafast pulse shapes are used to control simultaneously the optimal population transfer coefficients and rotational wave packet quaninterferences in the...

Confirmation of Interstellar Acetone

October 1, 2002

Author(s)

Lewis E. Snyder, Francis J. Lovas, David Mehringer, Nina Yanti Miao, Y J. Kuan, J M. Hollis

We present new observations of interstellar acetone [(CH3)(2) CO] from both the NRAO 12 m and the BIMA array. We report NRAO 12 m detections of 13 new acetone...

Predissociations in the 0_u⁺ and 1_g States of K₂

October 1, 2002

Author(s)

T Bergeman, Paul S. Julienne, Carl J. Williams, Eite Tiesinga, M R. Manaa, H Wang, P L. Gould, W C. Stwalley

Recently Wang, Gould and Stwalley showed by exciting atomic fragments that predissociation occurs in the Ig and O + u states of K2. In this study, we supplement...

Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic ⁶Li

October 1, 2002

Author(s)

K M. O'Hara, S L. Hemmer, M E. Granade, M E. Gehm, J E. Thomas, V Venturi, Eite Tiesinga, Carl J. Williams

We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of 6Li. To locate the zero crossing, we monitor the decrease...

Carbonyl Sulfide: A Review of its Chemistry and Properties

October 1, 2002

Author(s)

P D. Svoronos, Thomas J. Bruno

A number of years have elapsed since the last comprehensive review of the chemical properties of carbonyl sulfide (COS), with specific attention to the tendency...

Reaction Kinetics in the Ionic Liquid Methyltributylammonium Bis(trifluoro- methylsulfonyl)imide. Pulse Radiolysis Study of 4-Mercaptobenzoic Acid

October 1, 2002

Author(s)

J Grodkowski, Pedatsur Neta

Hydrogen-abstraction reactions of various radicals with 4-mercaptobenzoic acid (MB) to produce the 4-carboxyphenylthiyl radical have been studied by pulse...

APEX Method and Real-Time Blind Deconvolution of Scanning Electron Microscope Imagery

October 1, 2002

Author(s)

Alfred S. Carasso, David S. Bright, Andras Vladar

Loss of resolution due to image blurring is a major concern in electron microscopy. The point spread function describing that blur is generally unknown. Wer...

Pressure-induced shift and broadening of 1560-1630 nm carbon monoxide wavelength calibration lines

October 1, 2002

Author(s)

William C. Swann, Sarah L. Gilbert

We have measured the line centers and pressure-induced shift of 14 lines in the 3 Ņ rotational-vibrational band of carbon monoxide 12C 16O and 18 lines in the...

Bimodal Size Distribution of Self-Assembled InGaAs Quantum Dots

September 23, 2002

Author(s)

Solveig Anders, C. S. Kim, Benjamin D. Klein, Mark W. Keller, Richard Mirin

We investigate energy level quantization in self-assembled InGaAs quantum dots that are embedded In a GaAs matrix. We use capacitance and photoluminescence...

Using Extrathermodynamic Relationships To Model the Temperature Dependence of Henry's Law Constants of 209 PCB Congeners

September 19, 2002

Author(s)

H. A. Bamford, Dianne L. Poster, Robert E. Huie, J. E. Baker

Viscoelastic Characterization of Sealant Materials

September 18, 2002

Author(s)

Donald L. Hunston, Christopher C. White

Polymeric sealants are an important example of a major consumer product where the performance depends critically on rheological properties. The work here...

The 2001 Material Research Society (MRS) Fall Meeting Report

September 17, 2002

Author(s)

Winnie K. Wong-Ng

The 2001 Materials Research Society (MRS) annual meeting took place in Boston Copely Plaza (in the spacious Hynes Convention Center) from November 25-30. The...

Detection of coherent and incoherent spin dynamics during the magnetic switching process using vector-resolved nonlinear magneto-optics

September 16, 2002

Author(s)

Thomas J. Silva, Pavel Kabos, Matthew Pufall

It is usually assumed that magnetic switching proceeds via coherent rotation under conditions of high symmetry. There is no a priori reason to expect an...

Importance of Product Inhibition in the Kinetics of the Acylase Hydrolysis Reaction by Differential Stopped Flow Microcalorimetry

September 15, 2002

Author(s)

M Stodeman, Frederick P. Schwarz

The hydrolysis of N-acetyl-L-methionine, N-acetylglycine, N-acetyl-L-phenylalanine, and N-acetyl-L-alanine at 298.35 K by porcine kidney acylase I (EC 3.5.1.14)...

Determination of Methylmercury and Butyltin Compounds in Marine Biota and Sediments using Micorwave-Assisted Acid Extraction/Digestion, Soldi-Phase Microextraction, and Gas Chromatography with Microwave-Induced Plasma Atomic Emission Spectrometric Detecti

September 15, 2002

Author(s)

S. Tutschku, Michele M. Schantz, Stephen Wise

Application of an On-Line Weld Monitoring System

September 12, 2002

Author(s)

Thomas A. Siewert, Ivan Samardzic, Stefanija Klaric

quisition analysis and real-time manipulation of the welding parameters offer added controls over the weld quality. Thanks to the continual development of...

A Novel Multiplex for Simultaneous Amplification of 20 Y Chromosome STR Markers

September 10, 2002

Author(s)

John M. Butler, R Schoske, Peter M. Vallone, Margaret C. Kline, A J. Redd, M F. Hammer

A multiplex PCR assay capable of simultaneously amplifying 20 Y-chromosome short tandem repeat (STR) markers has been developed to aid human identity testing...

Rabi Oscillations in a Large Josephson Junction Qubit

September 9, 2002

Author(s)

John M. Martinis, Sae Woo Nam, Joe Aumentado, C Urbina

We have designed and operated a circuit based on a large-area current-biased Josephson junction whose two lower energy quantum levels could be used to implement...

Electron Interactions with Plasma Processing Gases: Present Status and Future Needs

September 9, 2002

Author(s)

Loucas G. Christophorou, James K. Olthoff

The work conducted at the National Institute of Standards and Technology over the last 7 years on the systematic synthesis and assessment of fundamental...

Improved Cryogenic Capacitor for the ECCS: Larger Value (10 pF) and SI Measurement by Tuning the Calculable Capacitor

September 4, 2002

Author(s)

Neil M. Zimmerman, Mahmoud A. El-Sabbagh, Yicheng Wang

We report on several advances in the development of a cryogenic vacuum-gap capacitor C cryo, for use with the electron-counting cpacitance standard (ECCS)...

Overview of the World Trade Center Collapse & NIST Response

September 2, 2002

Author(s)

Kuldeep R. Prasad, Ronald G. Rehm, William M. Pitts, Howard R. Baum, D D. Evans, Kevin B. McGrattan, Glenn P. Forney

Overview of the World Trade Center

Dynamic Antiferromagnetic Spin Structure and Domains in Exchange Coupled Multilayers.

September 2, 2002

Author(s)

Valerian I. Nikitenko, Alexander J. Shapiro, Robert D. Shull

Analysis of Kaolinite/Chrysotile Mixtures by Ashing and X-Ray Diffraction

September 1, 2002

Author(s)

Jennifer R. Verkouteren, Eric S. Windsor, Joseph M. Conny, R L. Perkins, J T. Ennis

A simple ashing procedure is described that converts kaolinite to amorphous metakaolinite while retaining the diffraction intensity of chrysotile. This ashing...

Combined Result and the Associated Uncertainty from Interlaboratory Evaluations Based on the ISO Guide

September 1, 2002

Author(s)

Raghu N. Kacker, Raju V. Datla, Albert C. Parr

We address the problem of determining the combined result and the associated uncertainty in measurement of a common measurand by a set of competent laboratories...

Security Functional Testing Using an Interface-Driven Model-Based Test Automation Approach

September 1, 2002

Author(s)

Ramaswamy Chandramouli, Mark Blackburn

Independent security functional testing on a product occupies a backseat in traditional security evaluation because of the cost and stringent coverage...

Analysis of Switching in Uniformly Magnetized Bodies

September 1, 2002

Author(s)

Michael J. Donahue, Donald G. Porter

A full analysis of magnetization reversal of a uniformly magnetized particle by coherent rotation is presented.The magnetization energy of the particle in the...

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